Why does L&L's Easy-Fire e28T-3 3-phase kiln have a maximum cone of 10, while some other popular brands have a maximum cone of only 8?

Why does L&L's Easy-Fire e28T-3 3-phase kiln have a maximum cone of 10, while some other popular brands have a maximum cone of only 8?

A:

On the Easy-Fire e28T-3 kiln (and School-Master SM28T-3) you will find the cone rating is limited by the KW of the kiln. On single phase kilns, because of the 48 amp restriction before you get into more expensive branch fusing, all of the kiln manufacturers limit the KW to around 11.5. However, when you have three phase available it is possible to increase the KW of the kiln without going over the 48 amp restriction. We take advantage of that possibility while it seems that some other kiln companies do not.